package com.gzr.demo01.lock;

// 死锁：多个线程互相抱着对方需要的资源，然后形成僵持
public class DeadLock {
    public static void main(String[] args) {
        Makeup g1 = new Makeup(0,"小红");
        Makeup g2 = new Makeup(1,"白学公主");
        g1.start();
        g2.start();
    }
}

// 口红
class Lipstick{

}

// 镜子
class Mirror{

}

// 化妆
class Makeup extends Thread{
    // 需要的资源只有一份，用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();
    int choice;// 选择
    String girlName; //使用化妆品的人
    Makeup(int choice,String girlName){
        this.choice = choice;
        this.girlName = girlName;
    }

    @Override
    public void run() {
        // 化妆
        try {
            makeup();
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }

    // 化妆，互相持有对方的锁，就是需要拿到对方的资源
    private void makeup() throws InterruptedException {
        if (choice == 0){
            synchronized (lipstick) { // 获得口红的锁
                System.out.println(this.girlName+"获得口红的锁");
                Thread.sleep(1000);
                synchronized (mirror){  // 一秒钟后想获得镜子
                    System.out.println(this.girlName+"获得镜子的锁");
                }
            }
        }else {
            synchronized (mirror) { // 获得镜子的锁
                System.out.println(this.girlName+"获得镜子的锁");
                Thread.sleep(1000);
                synchronized (lipstick){  // 一秒钟后想获得口红
                    System.out.println(this.girlName+"获得口红的锁");
                }
            }
        }
    }
}
